import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import { decryptBase64, decryptWithAes, encryptBase64, encryptWithAes, generateAesKey } from './crypto'
import { decrypt, encrypt } from './jsencrypt'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  (config) => {
    // 添加令牌
    if (store.getters.token) {
      config.headers['Authorization'] = `Bearer ${getToken()}`
    }

    // 是否加密
    const isEncrypt = config.headers['Is-Encrypt']
    if (isEncrypt) {
      const rk = generateAesKey()
      config.headers['Encrypt-Key'] = encrypt(encryptBase64(rk))
      config.data = encryptWithAes(JSON.stringify(config.data), rk)
    }

    return config
  },
  (error) => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**  * If you want to get http information such as headers or status
   * Please return  response => response
   */

  /**  * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  (response) => {
    // 二进制数据则直接返回
    if (response.request.responseType === 'blob' || response.request.responseType === 'arraybuffer') {
      return response
    }

    // 是否加密
    const encryptKey = response.headers['encrypt-key']
    if (encryptKey) {
      const aesKey = decryptBase64(decrypt(encryptKey))
      const decryptData = decryptWithAes(response.data, aesKey)
      response.data = JSON.parse(decryptData)
    }

    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code && res.code !== 200) {
      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 202 || res.code === 209) {
        // to re-login
        MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '确认退出', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning'
        })
          .then(async () => {
            await store.dispatch('user/resetToken')
            window.location.href = '/'
          })
          .catch(() => {})
      } else {
        Message({
          message: res.message || 'Error',
          type: 'error',
          duration: 5 * 1000
        })
      }

      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  (error) => {
    console.log('err' + error) // for debug
    Message({
      message: error.message || 'Error',
      type: 'error',
      duration: 5 * 1000
    })

    return Promise.reject(error)
  }
)

export default service
